Pet climbing ladder



FIG. 1 is a front elevation view of a pet climbing ladder, showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a rear, bottom, and right side perspective view thereof;

FIG. 8 is a front, top, and left side perspective view thereof;

FIG. 9 is a front, top, and left side perspective view thereof, shown in an alternative configuration;

FIG. 10 is a rear, top, and left side perspective view thereof, shown in the alternative configuration; and,

FIG. 11 is a rear, bottom, and left side perspective view thereof, shown in the alternative configuration. 

CLAIM The ornamental design for a pet climbing ladder, as shown and described. 